Add missing "post-install-output" to flex endpoint

Author: nicolas-grekas

src/GenerateFlexEndpointCommand.php

@@ -95,7 +95,15 @@ private function generatePackageJson(string $repository, string $sourceBranch, b
 
         foreach (new \RecursiveIteratorIterator($it) as $path => $file) {
             $file = substr($path, 1 + \strlen($package.'/'.$version));
-            if (is_dir($path) || \in_array($file, ['manifest.json', 'post-install.txt', 'Makefile'], true)) {
+            if (is_dir($path) || 'manifest.json' === $file) {
+                continue;
+            }
+            if ('post-install.txt' === $file) {
+                $manifest['post-install-output'] = explode("\n", rtrim(str_replace("\r", '', file_get_contents($path)), "\n"));
+                continue;
+            }
+            if ('Makefile' === $file) {
+                $manifest['makefile'] = explode("\n", rtrim(str_replace("\r", '', file_get_contents($path)), "\n"));
                 continue;
             }
             $contents = file_get_contents($path);

src/LintManifestsCommand.php

@@ -93,12 +93,16 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             }
 
             foreach (scandir("$package/$version") as $file) {
+                $path = "$package/$version/$file";
+
                 if (\in_array($file, self::SPECIAL_FILES, true)) {
+                    if (is_file($path) && !preg_match('//u', file_get_contents($path))) {
+                        $output->writeln(sprintf('::error file=%s::File "%s" must be UTF-8 encoded', $path, $file));
+                        $exit = 1;
+                    }
                     continue;
                 }
 
-                $path = "$package/$version/$file";
-
                 if (is_dir($path)) {
                     if (isset($data['copy-from-recipe'][$file.'/'])) {
                         // no-op